internet problem

Hi, I have been having this problem for several months now. After surfing the net for around 40 mins+ my connection drops out. I have just purchased a new Belkin modem however this did not fix the problem. If I reboot the modem this does not work. I have run winsock fix and this also does not fix the problem. The only way i can reconnect is to restart the computer. A few helpful notes: when I click on the connections tab in internet properties there is nothing in the dial up and virtual network settings box when I lose connection if i right click on the icon for my connection in the network connections window, then status, then support, there is nothing in the ip address, default address and submask address. If I try to repair the connection it comes up with an error message saying that it could not locate the ip address or similar and I don't know how this is linked but my speakers don't work when this happens. I have run spyware doctor, ad-Aware se and I use bullguard for anti virus, occasionally they find minor threats but nothing major. Could someone please give me some advice on how to fix this problem :cry

 

How are you connecting to your modem? USB? Wireless? Ethernet?

If your using USB, switch over to ethernet. It's usually faster and more stable.

 

I use a Ethernet cable and I have replaced it to make sure it was not the problem